Do you actually have a use for the high bandwidth options? Sure 20+GHz sounds really impressive, but you need much more expensive cables, adapters, probes, etc. to actually use much of it. If you stick to <15GHz, at the very least, you can probably get an N connector (or maybe a 3.5mm connector) and have an easier time connecting to more common lower frequency stuff.
Regardless of that, the expense often comes with bandwidth, so think on how much you really want to be able to see, and see if your budget can stretch farther without the extra bandwidth - maybe more options, maybe a more modern SA, maybe some accessories you were looking at.
Once you get beyond 6GHz or so, you really don't run into all that many signals floating around in the air in a home lab, and you'll only run into most of those if you're also generating the signal (and a 10GHz signal generator is not a cheap thing), or you're working on high frequency RF gear.
Also worth considering form factor and connector options, if you've got a computer already (and you probably do), a USB SA has a tiny space requirement and can be a great option, but maybe you want it to be standalone (other things using the computer, limited screen space, whatever), maybe you want a direct IF output or I/Q inputs or outputs, and with most USB SAs, they're not available. If physical space is a concern, you have the option of the more modern SAs that aren't deep, or going after a portable SA like an FSH or SpectrumMaster. There's pros and cons to all sorts of stuff, but until you know the kind of stuff you want to do and have some experience using them, it will be difficult to decide when you have a very broad selection to choose from.